it depends on what they ordered, our “Upside Down pizza” (AKA, Tomato Pie) gets everything on top of the cheese/sauce, our normal pies get the meats under the cheese, unless it is only pepperoni, then the pepperoni goes on top.
If it is a sausage pepperoni, the pepperoni gets oriented somewhat vertical under the cheese by sticking it to the sausage so it sticks up through the cheese.
For here, it is all about being visually appealing, and a ton of toppings (Midwest area)
Sausage portioning on a 16" pie is 8 ounces raw here
@Joe
A trick to pinching raw is to get some sauce on your hands, it acts like lubricant to make pinching raw sausage go so much faster, and easier cleanup after the fact. I teach my guys to take put a bit of sauce on the web of their hand between the thumb and forefinger, squeeze out the sausage, and use the other hand to pinch to flatten and place on the pie.